/* * Generic platform device PATA driver * * Copyright (C) 2006 Paul Mundt * * Based on pata_pcmcia: * * Copyright 2005-2006 Red Hat Inc , all rights reserved. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. */ #include #include #include #include #include #include #include #include #include #define DRV_NAME "pata_platform" #define DRV_VERSION "0.1.2" static int pio_mask = 1; /* * Provide our own set_mode() as we don't want to change anything that has * already been configured.. */ static int pata_platform_set_mode(struct ata_port *ap, struct ata_device **unused) { int i; for (i = 0; i < ATA_MAX_DEVICES; i++) { struct ata_device *dev = &ap->device[i]; if (ata_dev_enabled(dev)) { /* We don't really care */ dev->pio_mode = dev->xfer_mode = XFER_PIO_0; dev->xfer_shift = ATA_SHIFT_PIO; dev->flags |= ATA_DFLAG_PIO; } } return 0; } static struct scsi_host_template pata_platform_sht = { .module = THIS_MODULE, .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = LIBATA_MAX_PRD, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = ATA_SHT_USE_CLUSTERING, .proc_name = DRV_NAME, .dma_boundary = ATA_DMA_BOUNDARY, .slave_configure = ata_scsi_slave_config, .slave_destroy = ata_scsi_slave_destroy, .bios_param = ata_std_bios_param, }; static struct ata_port_operations pata_platform_port_ops = { .set_mode = pata_platform_set_mode, .port_disable = ata_port_disable, .tf_load = ata_tf_load, .tf_read = ata_tf_read, .check_status = ata_check_status, .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, .freeze = ata_bmdma_freeze, .thaw = ata_bmdma_thaw, .error_handler = ata_bmdma_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, .qc_prep = ata_qc_prep, .qc_issue = ata_qc_issue_prot, .data_xfer = ata_data_xfer_noirq, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, .irq_on = ata_irq_on, .irq_ack = ata_irq_ack, .port_start = ata_port_start, }; static void pata_platform_setup_port(struct ata_ioports *ioaddr, struct pata_platform_info *info) { unsigned int shift = 0; /* Fixup the port shift for platforms that need it */ if (info && info->ioport_shift) shift = info->ioport_shift; ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift); ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift); ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift); ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift); ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift); ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift); ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift); ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift); ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift); ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift); } /** * pata_platform_probe - attach a platform interface * @pdev: platform device * * Register a platform bus IDE interface. Such interfaces are PIO and we * assume do not support IRQ sharing. * * Platform devices are expected to contain 3 resources per port: * * - I/O Base (IORESOURCE_IO or IORESOURCE_MEM) * - CTL Base (IORESOURCE_IO or IORESOURCE_MEM) * - IRQ (IORESOURCE_IRQ) * * If the base resources are both mem types, the ioremap() is handled * here. For IORESOURCE_IO, it's assumed that there's no remapping * necessary. */ static int __devinit pata_platform_probe(struct platform_device *pdev) { struct resource *io_res, *ctl_res; struct ata_probe_ent ae; unsigned int mmio; /* * Simple resource validation .. */ if (unlikely(pdev->num_resources != 3)) { dev_err(&pdev->dev, "invalid number of resources\n"); return -EINVAL; } /* * Get the I/O base first */ io_res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (io_res == NULL) { io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (unlikely(io_res == NULL)) return -EINVAL; } /* * Then the CTL base */ ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1); if (ctl_res == NULL) { ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); if (unlikely(ctl_res == NULL)) return -EINVAL; } /* * Check for MMIO */ mmio = (( io_res->flags == IORESOURCE_MEM) && (ctl_res->flags == IORESOURCE_MEM)); /* * Now that that's out of the way, wire up the port.. */ memset(&ae, 0, sizeof(struct ata_probe_ent)); INIT_LIST_HEAD(&ae.node); ae.dev = &pdev->dev; ae.port_ops = &pata_platform_port_ops; ae.sht = &pata_platform_sht; ae.n_ports = 1; ae.pio_mask = pio_mask; ae.irq = platform_get_irq(pdev, 0); ae.irq_flags = 0; ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST; /* * Handle the MMIO case */ if (mmio) { ae.port[0].cmd_addr = devm_ioremap(&pdev->dev, io_res->start, io_res->end - io_res->start + 1); ae.port[0].ctl_addr = devm_ioremap(&pdev->dev, ctl_res->start, ctl_res->end - ctl_res->start + 1); } else { ae.port[0].cmd_addr = devm_ioport_map(&pdev->dev, io_res->start, io_res->end - io_res->start + 1); ae.port[0].ctl_addr = devm_ioport_map(&pdev->dev, ctl_res->start, ctl_res->end - ctl_res->start + 1); } if (!ae.port[0].cmd_addr || !ae.port[0].ctl_addr) { dev_err(&pdev->dev, "failed to map IO/CTL base\n"); return -ENOMEM; } ae.port[0].altstatus_addr = ae.port[0].ctl_addr; pata_platform_setup_port(&ae.port[0], pdev->dev.platform_data); if (unlikely(ata_device_add(&ae) == 0)) return -ENODEV; return 0; } /** * pata_platform_remove - unplug a platform interface * @pdev: platform device * * A platform bus ATA device has been unplugged. Perform the needed * cleanup. Also called on module unload for any active devices. */ static int __devexit pata_platform_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct ata_host *host = dev_get_drvdata(dev); ata_host_detach(host); dev_set_drvdata(dev, NULL); return 0; } static struct platform_driver pata_platform_driver = { .probe = pata_platform_probe, .remove = __devexit_p(pata_platform_remove), .driver = { .name = DRV_NAME, .owner = THIS_MODULE, }, }; static int __init pata_platform_init(void) { return platform_driver_register(&pata_platform_driver); } static void __exit pata_platform_exit(void) { platform_driver_unregister(&pata_platform_driver); } module_init(pata_platform_init); module_exit(pata_platform_exit); module_param(pio_mask, int, 0); MODULE_AUTHOR("Paul Mundt"); MODULE_DESCRIPTION("low-level driver for platform device ATA"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION);